Load Specifications
Load data in caliber 7 mm WSM with .284 | 156gr | Lapua Naturalis bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 54,462 psi | 85% | 2858 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,985 psi | 88% | 2894 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,898 psi | 88% | 2995 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 57,363 psi | 90% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,115 psi | 88% | 2936 fps | 99% |
| ADI AR 2213 | <<locked>> | 98% | 57,638 psi | 90% | 2999 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,466 psi | 63% | 2730 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,259 psi | 87% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,246 psi | 88% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,696 psi | 90% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,869 psi | 88% | 2930 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,305 psi | 90% | 2995 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,549 psi | 85% | 2917 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 2913 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,737 psi | 86% | 3009 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,173 psi | 88% | 2976 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 56,492 psi | 89% | 2851 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,470 psi | 73% | 2844 fps | 96.9% |
| Bofors RP5 | <<locked>> | 98% | 57,305 psi | 90% | 2995 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 55,361 psi | 87% | 2841 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,647 psi | 78% | 2854 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 56,492 psi | 89% | 2867 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,406 psi | 90% | 2943 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,666 psi | 89% | 2897 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 53,969 psi | 85% | 2877 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,652 psi | 89% | 2920 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,782 psi | 89% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,501 psi | 78% | 2969 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 53,766 psi | 84% | 2920 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 1788 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,826 psi | 89% | 2835 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,304 psi | 88% | 2874 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,478 psi | 89% | 2861 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,289 psi | 88% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,332 psi | 87% | 2864 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 55,361 psi | 87% | 2972 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 57,392 psi | 90% | 2828 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,319 psi | 90% | 2864 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,376 psi | 87% | 2858 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,779 psi | 81% | 2818 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 57,363 psi | 90% | 2930 fps | 99% |
| Norma MRP | <<locked>> | 96% | 57,043 psi | 89% | 3018 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 54,346 psi | 85% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,782 psi | 87% | 2992 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 56,637 psi | 89% | 2933 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,911 psi | 84% | 2927 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,115 psi | 88% | 2851 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,058 psi | 89% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,767 psi | 87% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,551 psi | 90% | 2999 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 2963 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 56,579 psi | 89% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,302 psi | 85% | 2854 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 55,274 psi | 87% | 2917 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,361 psi | 87% | 2841 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,319 psi | 90% | 2864 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,392 psi | 90% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,376 psi | 87% | 2858 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,070 psi | 85% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,507 psi | 89% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,826 psi | 89% | 2818 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,824 psi | 86% | 2913 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,231 psi | 88% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,970 psi | 88% | 2848 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 54,172 psi | 85% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,956 psi | 88% | 2894 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 57,421 psi | 90% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,072 psi | 88% | 2864 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,230 psi | 87% | 2867 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 55,492 psi | 87% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,188 psi | 90% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,985 psi | 89% | 3009 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 2930 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,405 psi | 87% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,711 psi | 90% | 2946 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,520 psi | 85% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,724 psi | 87% | 2884 fps | 98.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 32,460 psi | 51% | 2431 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 43,178 psi | 68% | 2680 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 92% | 48,950 psi | 77% | 2874 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 50,763 psi | 80% | 2753 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,886 psi | 64% | 2654 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 44,454 psi | 70% | 2759 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 35,752 psi | 56% | 2612 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,938 psi | 81% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,017 psi | 64% | 2680 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,804 psi | 73% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,334 psi | 60% | 2595 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,769 psi | 61% | 2651 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,835 psi | 48% | 2454 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,763 psi | 48% | 2467 fps | 95.6% |
| Alliant Reloder-26 | 56.4 gr | 80% | 33,257 psi | 52% | 2579 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 38,464 psi | 60% | 2641 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 52,837 psi | 83% | 2795 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,915 psi | 64% | 2726 fps | 95.2% |
| Bofors RP5 | <<locked>> | 86% | 38,769 psi | 61% | 2651 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 46,064 psi | 72% | 2677 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 40,959 psi | 64% | 2677 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,837 psi | 83% | 2812 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,353 psi | 70% | 2717 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 46,978 psi | 74% | 2733 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 47,471 psi | 74% | 2766 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,572 psi | 73% | 2746 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,914 psi | 61% | 2572 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,450 psi | 60% | 2717 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 43,468 psi | 68% | 2736 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 44% | 1601 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,432 psi | 84% | 2785 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,539 psi | 65% | 2608 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,355 psi | 74% | 2707 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 40,988 psi | 64% | 2625 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,151 psi | 72% | 2703 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 45,426 psi | 71% | 2792 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 54,259 psi | 85% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,063 psi | 71% | 2657 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 43,424 psi | 68% | 2648 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 31,836 psi | 50% | 2415 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 41,234 psi | 65% | 2641 fps | 95.7% |
| Norma MRP | 56.1 gr | 82% | 35,534 psi | 56% | 2602 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 42,235 psi | 66% | 2667 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 42,395 psi | 66% | 2740 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,988 psi | 64% | 2654 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 37,913 psi | 59% | 2621 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 44% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,547 psi | 82% | 2795 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,530 psi | 78% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,699 psi | 67% | 2697 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,915 psi | 64% | 2703 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,346 psi | 55% | 2631 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 49,966 psi | 78% | 2746 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,049 psi | 71% | 2690 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 40,132 psi | 63% | 2638 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 46,064 psi | 72% | 2677 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,063 psi | 71% | 2657 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 54,259 psi | 85% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,424 psi | 68% | 2648 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,821 psi | 80% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,096 psi | 79% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,193 psi | 69% | 2605 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,769 psi | 62% | 2631 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 49,792 psi | 78% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,122 psi | 72% | 2680 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 39,001 psi | 61% | 2625 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,940 psi | 56% | 2513 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 47,645 psi | 75% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,656 psi | 68% | 2661 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 37,666 psi | 59% | 2546 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 43,047 psi | 67% | 2664 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 34,693 psi | 54% | 2536 fps | 98.7% |
| Vihtavuori N560 | 61.6 gr | 90% | 46,659 psi | 73% | 2828 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 43,366 psi | 68% | 2749 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,511 psi | 67% | 2625 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,599 psi | 70% | 2723 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,601 psi | 43% | 2457 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,914 psi | 63% | 2602 fps | 95.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 85 powders for 7 mm WSM loaded with the .284 | 156gr | Lapua Naturalis. Winchester StaBALL HD delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,048 fps. ADI AR 2217 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm WSM with the .284 | 156gr | Lapua Naturalis they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.